Home / 13,320-19,983.92-3,960.09

Finding the Fourth Proportional to 13,320, 19,983.92 and 3,960.09

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Solution

The fourth proportional to 13,320, 19,983.92 and 3,960.09 is: 5,941.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320 : 19,983.92 = 3,960.09 : x
  2. Step 2: Convert to fraction form
    13,320/19,983.92 = 3,960.09/x
  3. Step 3: Cross multiply
    13,320x = 19,983.92 × 3,960.09
  4. Step 4: Simplify right side
    13,320x = 79,138,101.95
  5. Step 5: Solve for x
    x = 79,138,101.95/13,320
  6. Step 6: Final answer
    x = 5,941.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.